14 Aug 1940HMS Talisman (Lt.Cdr. P.S. Francis, RN) ended her 1st war patrol at Falmouth. She departed for Rothesay later the same day. During the passage north through the Irish Sea she was escorted by HMS St. Modwen (Cdr.(Retd.) W.A. Ford, RN). (8)

20 May 1943HMS Upstart (Lt. P.C. Chapman, DSC and Bar, RN) conducted A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). Practice attacks were then made on the same ships. Upon completion of all these exercises HMS Upstart proceeded to Larne. (53)

13 Oct 1944While en-route from Campbeltown to the exercise area HrMs O 15 (Lt. R.W. van Lynden, RNN) is rammed by HMS Bretwalda (Skr. J.B. Henderson, RNR). The next morning, during a dive, minor damage to the Starboard propeller and the pressure hull is discovered. Arrangements were made for repairs.

After being rammed O 15 continued to the exercise area and conducted A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, DSC, RNR) and HMS Valena (T/Lt. H. Trefusis, RNVR). (102)